11using System ;
22using System . Collections . Generic ;
3+ using System . Drawing ;
4+ using System . IO ;
35using System . Linq ;
46using System . Text ;
7+ using System . Threading ;
58using System . Threading . Tasks ;
69using System . Windows ;
710using System . Windows . Controls ;
1417
1518namespace RawInput . Touchpad
1619{
17- public partial class MainWindow : Window
18- {
19- public bool TouchpadExists
20- {
21- get { return ( bool ) GetValue ( TouchpadExistsProperty ) ; }
22- set { SetValue ( TouchpadExistsProperty , value ) ; }
23- }
24- public static readonly DependencyProperty TouchpadExistsProperty =
25- DependencyProperty . Register ( "TouchpadExists" , typeof ( bool ) , typeof ( MainWindow ) , new PropertyMetadata ( false ) ) ;
26-
27- public string TouchpadContacts
28- {
29- get { return ( string ) GetValue ( TouchpadContactsProperty ) ; }
30- set { SetValue ( TouchpadContactsProperty , value ) ; }
31- }
32- public static readonly DependencyProperty TouchpadContactsProperty =
33- DependencyProperty . Register ( "TouchpadContacts" , typeof ( string ) , typeof ( MainWindow ) , new PropertyMetadata ( null ) ) ;
34-
35- public MainWindow ( )
36- {
37- InitializeComponent ( ) ;
38- }
39-
40- private HwndSource _targetSource ;
41- private readonly List < string > _log = new ( ) ;
42-
43- protected override void OnSourceInitialized ( EventArgs e )
44- {
45- base . OnSourceInitialized ( e ) ;
46-
47- _targetSource = PresentationSource . FromVisual ( this ) as HwndSource ;
48- _targetSource ? . AddHook ( WndProc ) ;
49-
50- TouchpadExists = TouchpadHelper . Exists ( ) ;
51-
52- _log . Add ( $ "Precision touchpad exists: { TouchpadExists } ") ;
53-
54- if ( TouchpadExists )
55- {
56- var success = TouchpadHelper . RegisterInput ( _targetSource . Handle ) ;
57-
58- _log . Add ( $ "Precision touchpad registered: { success } ") ;
59- }
60- }
61-
62- private IntPtr WndProc ( IntPtr hwnd , int msg , IntPtr wParam , IntPtr lParam , ref bool handled )
63- {
64- switch ( msg )
65- {
66- case TouchpadHelper . WM_INPUT :
67- var contacts = TouchpadHelper . ParseInput ( lParam ) ;
68- TouchpadContacts = string . Join ( Environment . NewLine , contacts . Select ( x => x . ToString ( ) ) ) ;
69-
70- _log . Add ( "---" ) ;
71- _log . Add ( TouchpadContacts ) ;
72- break ;
73- }
74- return IntPtr . Zero ;
75- }
76-
77- private void Copy_Click ( object sender , RoutedEventArgs e )
78- {
79- Clipboard . SetText ( string . Join ( Environment . NewLine , _log ) ) ;
80- }
81- }
82- }
20+ public partial class MainWindow : Window
21+ {
22+ [ System . Runtime . InteropServices . DllImport ( "user32.dll" ) ]
23+ static extern bool DestroyIcon ( IntPtr handle ) ;
24+
25+ public bool TouchpadExists
26+ {
27+ get { return ( bool ) GetValue ( TouchpadExistsProperty ) ; }
28+ set { SetValue ( TouchpadExistsProperty , value ) ; }
29+ }
30+
31+ public static readonly DependencyProperty TouchpadExistsProperty =
32+ DependencyProperty . Register (
33+ "TouchpadExists" ,
34+ typeof ( bool ) ,
35+ typeof ( MainWindow ) ,
36+ new PropertyMetadata ( false )
37+ ) ;
38+
39+ public string TouchpadContacts
40+ {
41+ get { return ( string ) GetValue ( TouchpadContactsProperty ) ; }
42+ set { SetValue ( TouchpadContactsProperty , value ) ; }
43+ }
44+
45+ public static readonly DependencyProperty TouchpadContactsProperty =
46+ DependencyProperty . Register (
47+ "TouchpadContacts" ,
48+ typeof ( string ) ,
49+ typeof ( MainWindow ) ,
50+ new PropertyMetadata ( null )
51+ ) ;
52+
53+ // reference to tray icon
54+ private System . Windows . Forms . NotifyIcon _notifyIcon ;
55+
56+ // tracks if touch is showing, used to avoid updating the icon if it is already correct
57+ private int _touchesShowing = 0 ;
58+
59+ // when was the last touch event received
60+ private long _lastTouchTime = 0 ;
61+
62+ // timer to expire last touch event to detect when no one is touching the track pad anymore
63+ private Timer _touchTimer ;
64+
65+ // list of all received touch events
66+ private readonly List < string > _log = new ( ) ;
67+
68+ public MainWindow ( )
69+ {
70+ InitializeComponent ( ) ;
71+
72+ // add tray icon
73+ _notifyIcon = new System . Windows . Forms . NotifyIcon
74+ {
75+ Text = "Touchpad Monitor" ,
76+ Visible = true ,
77+ } ;
78+ SetIconState ( System . Drawing . Color . Red , ' ' ) ;
79+ // restore window on tray icon click
80+ _notifyIcon . Click += ( s , e ) => RestoreWindow ( ) ;
81+ // keep window on top when showing
82+ Topmost = true ;
83+ // start window in bottom right corner
84+ var workingArea = SystemParameters . WorkArea ;
85+ Left = workingArea . Width - Width ;
86+ Top = workingArea . Height - Height ;
87+ // start timer to track expired touches
88+ _touchTimer = new Timer ( TouchTimerCallback , null , 0 , 50 ) ;
89+ }
90+
91+ protected override void OnClosed ( EventArgs e )
92+ {
93+ base . OnClosed ( e ) ;
94+
95+ _notifyIcon . Dispose ( ) ;
96+ }
97+
98+ protected override void OnStateChanged ( EventArgs e )
99+ {
100+ base . OnStateChanged ( e ) ;
101+
102+ if ( WindowState == WindowState . Minimized )
103+ {
104+ Hide ( ) ;
105+ _notifyIcon . Visible = true ;
106+ }
107+ }
108+
109+ protected override void OnSourceInitialized ( EventArgs e )
110+ {
111+ base . OnSourceInitialized ( e ) ;
112+
113+ var targetSource = PresentationSource . FromVisual ( this ) as HwndSource ;
114+ targetSource ? . AddHook ( WndProc ) ;
115+
116+ TouchpadExists = TouchpadHelper . Exists ( ) ;
117+
118+ _log . Add ( $ "Precision touchpad exists: { TouchpadExists } ") ;
119+
120+ if ( TouchpadExists )
121+ {
122+ var success = TouchpadHelper . RegisterInput ( targetSource . Handle ) ;
123+
124+ _log . Add ( $ "Precision touchpad registered: { success } ") ;
125+ }
126+
127+ Visibility = Visibility . Hidden ;
128+ }
129+
130+ private IntPtr WndProc ( IntPtr hwnd , int msg , IntPtr wParam , IntPtr lParam , ref bool handled )
131+ {
132+ switch ( msg )
133+ {
134+ case TouchpadHelper . WM_INPUT :
135+ var contacts = TouchpadHelper . ParseInput ( lParam ) ;
136+ _lastTouchTime = DateTimeOffset . UtcNow . ToUnixTimeMilliseconds ( ) ;
137+ TouchpadContacts = string . Join (
138+ Environment . NewLine ,
139+ contacts . Select ( x => x . ToString ( ) )
140+ ) ;
141+
142+ var touchCount = contacts . Length ;
143+
144+ if ( touchCount != _touchesShowing )
145+ {
146+ _touchesShowing = touchCount ;
147+ Background = new SolidColorBrush (
148+ System . Windows . Media . Color . FromRgb ( 144 , 238 , 144 )
149+ ) ;
150+ SetIconState ( System . Drawing . Color . Green , touchCount . ToString ( ) . ToCharArray ( ) [ 0 ] ) ;
151+ }
152+
153+ _log . Add ( "---" ) ;
154+ _log . Add ( TouchpadContacts ) ;
155+ break ;
156+ }
157+ return IntPtr . Zero ;
158+ }
159+
160+ private void Copy_Click ( object sender , RoutedEventArgs e )
161+ {
162+ Clipboard . SetText ( string . Join ( Environment . NewLine , _log ) ) ;
163+ }
164+
165+ private void TouchTimerCallback ( object state )
166+ {
167+ var now = DateTimeOffset . UtcNow . ToUnixTimeMilliseconds ( ) ;
168+ if ( now - _lastTouchTime > 100 && _touchesShowing > 0 )
169+ {
170+ Dispatcher . Invoke ( ( ) =>
171+ {
172+ _touchesShowing = 0 ;
173+ TouchpadContacts = "" ;
174+ Background = new SolidColorBrush (
175+ System . Windows . Media . Color . FromRgb ( 238 , 144 , 144 )
176+ ) ;
177+ SetIconState ( System . Drawing . Color . Red , ' ' ) ;
178+ } ) ;
179+ }
180+ }
181+
182+ private void RestoreWindow ( )
183+ {
184+ Show ( ) ;
185+ WindowState = WindowState . Normal ;
186+ Activate ( ) ;
187+ _notifyIcon . Visible = false ;
188+ }
189+
190+ private void SetIconState ( System . Drawing . Color color , char label )
191+ {
192+ using ( var icon = CreateCircleIcon ( color , label ) )
193+ {
194+ _notifyIcon . Icon = icon ;
195+ DestroyIcon ( icon . Handle ) ;
196+ }
197+ }
198+
199+ private static Icon CreateCircleIcon ( System . Drawing . Color color , char character )
200+ {
201+ int size = 32 ;
202+ using ( var bitmap = new Bitmap ( size , size ) )
203+ {
204+ using ( var graphics = Graphics . FromImage ( bitmap ) )
205+ {
206+ graphics . Clear ( System . Drawing . Color . Transparent ) ;
207+
208+ // Draw the circle with the specified color
209+ using ( var brush = new SolidBrush ( color ) )
210+ {
211+ graphics . FillEllipse ( brush , 0 , 0 , size , size ) ;
212+ }
213+
214+ // Set up the font and brush for the character
215+ using var font = new Font ( System . Drawing . FontFamily . GenericSansSerif , 6 , System . Drawing . FontStyle . Bold ) ;
216+ using var textBrush = new SolidBrush ( System . Drawing . Color . White ) ;
217+ // Measure the size of the character to center it
218+ SizeF textSize = graphics . MeasureString ( character . ToString ( ) , font ) ;
219+
220+ // Calculate the position to center the character
221+ float x = ( size - textSize . Width ) / 2 ;
222+ float y = ( size - textSize . Height ) / 2 ;
223+
224+ // Draw the character centered on the circle
225+ graphics . DrawString ( character . ToString ( ) , font , textBrush , x , y ) ;
226+ }
227+
228+ IntPtr hIcon = bitmap . GetHicon ( ) ;
229+ return System . Drawing . Icon . FromHandle ( hIcon ) ;
230+ }
231+ }
232+
233+ }
234+ }
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